Crushing machine



Feb. 9, 1937. O Q GRUENDER 2,070,270

CHUSHING MACHINE Filed Dec. 12, 1932 2 Sheets-Sheet 1 Invezzaor N r Q 050.17" 6. 671667216? Feb. 9, 1937.

O. C. GRUENDER CRUSHING MACHINE Filed Dec. -12, 1932 2 Sheets-Sheet 2 I750 @721507" Qatar" 6. 65724672 der Patented Feb. 9, 1937 PATENT OFFICE ciwsnmo MACHINE Oscar C. Gruender, Milwaukee, Wis., assignor to Nordberg Manufacturing 00., Milwaukee, Wis., a corporation of Wisconsin Application December 1 3 "Claims.

My invention relates to an improvement in crushing equipment and has for one purpose the provision of self-locking means for holding the mantle in place on a short head gyratory crusher. Another object is the provision of improved feeding means for feeding material to the feeding cavity. of such a crusher. Another object is the provision of improved means for holding the bowl liner of such a crusher in position. Other objects will appear from time to time in the course of the specification and claims. I

I illustrate my invention more or less diagrammatically in the accompanying drawings, where- Figure 1 is an axial vertical section;

Figure 2 is a plan view of the bowl structure;

Figure 3 is a section on the line 3-3 of Figure 2; and

Figure 4 is a. section on the line 4-4 of Figure 1.

Like parts are indicated by like symbols throughout.

Referring to the drawings, A generallyindi oates a fixed circumferential main frame which may be supported upon any suitable base. It is provided with a circumferential outwardly projecting upward flange A upon which is tiltably mounted the ring A the flange and ring being formed to interpenetrate as shown in Figure 1. A are springs tending normally to hold the ring fixed in.- relation to the flange by means of a. spring abutment A and the members A which maintain the springs under pressure.

B generally indicates the bowl structure. It includes an upwardly and inwardly inclined wall B an upwardly and outwardly inclined wall B and a generally cylindrical outer wall B herein shown as screwthreaded as at B to mesh with the screwthreaded ring A. Any suitable means may be employed for imparting rotation to the member B in relation to the ring A, whereby its vertical adjustment is obtained. It will be understood that such adjustingmeans, however, are not of themselves part of the present invention and will not be described in great detail. B is any suitable housing member herein shown as resting upon the top of the ring A and extending upwardly and inwardly as at 13, and housing the space above the area of screwthreaded contact with the members A and B. It is provided with apertures B through which pass headed screws or bolts l?" whereby the bowl may be drawn upwardly in order to lock it at any desired adjustment.- It will be noted that the lower portion of the screw B" is positioned within the space de- 2, 1932, Serial No. 646,825

fined by the walls 13 ,13 and B The 'wall B is provided with apertures B having removable cover plates B the purpose for which will later appear. The lower wall B is provided with a plurality of apertures B 5 C indicates a bowl liner for the bowl B which liner is provided with hook shaped flanges C adapted to penetrate through the apertures 3 and to be engaged by the generally U-shaped bolts C which pass through abutment blocks or 10 bolt plates C mounted on ribs 0* herein shownas formed integrally with the bowl'structure B and as connecting the walls B B C are nuts for the two arms of the bolt C and C indicate washers therefor. Compressed between the wash- 15 ers and the bolt plate C are springs C". C indicates any suitable lock washer or looking member adapted to rest on the washers C and to prevent rotation of the nuts C It will be observed that the apertures B and the cover plates 13 overlie the U-bolts C and the attaching means therefor, thus providing means of ready access thereto. Therib C on the lock washer extends up close to the coverplate B which serves to hold the look washer in place.

D indicates the bearing sleeve preferably formed integral with the frame A and connected thereto in any suitable manner by ribs or the like. It is provided with an upward enlargement D tatable within the cylindrical bore of the sleeve D is a sleeve D provided with an eccentric tapered bore D It carries at the top the drive gear D which rotates within the space D The gear D is in mesh with the pinion D on. the drive shaft D. D is a. cover plate carrying the spherical bearing member D.

E indicates a crusher shaft intermediate the aperture D Associated therewith is the crusher head E which is provided with a spherical bearing surface E adapted to conform to and rest 40 upon the spherical bearing member D Any suitable means may be employed for preventing the access of dust to the opposed spherical bearing surfaces. .1 illustrate for example the spherical surfaced outer members E, E formed concentric with the main surface E and an opposed wiping means therefor, E upwardly thrust thereagainst as by the springs E Mounted upon the outwardly tapered surface of the head E is the crushing mantle G. Opposed to the upper'edge thereof is the locking ring or nut G. G generally indicates a securing member secured as by the screws G to the top of the head E It is outwardly screwthreaded as at G to mesh with the nut G It will be understood securing member G thereby maintaining a.

downward pressure against the upper edge of the mantle G which automatically afiects its firm seating upon the head. G indicates a cover plate secured to the ring G as by the screws G It overlies also the heads of the screws G and serves as a species of generally horizontal feed plate for the top of thehead. It also has a central upward extension or sleeve G which surrounds a corresponding upward extension of the member G? in relation to which it may freely rotate when the nut G rotates in relation to the member 6*. I may employ, however, a wiping connection G to prevent the access of dust.

Secured to the top of the member G is a feed assembly having a central portion generally indicated as E. It may be held in position for example by the headed screws I-I Outwardly projecting therefrom are the ribs H upon which any suitable inwardly tapered hopper structure H may be mounted with removable wear taking plates H parts is such that any material delivered to the hopper; H will be directed thereby to the top of the member G whence it will find its way into It will be understood that rotation of the shaft D rotates the concentrically apertured sleeve D and thereby imparts gyration to the shaft E and the head E The efiect of the spherical support for the head is'to impart to it a movement as if it were being gyrated about a fixed center somewhat above the top of the head, the center about which the spherical bearing surface 1-; is described. This gyration effects the crushing movement of the head. Feed may be delivered to the top of the plate portions H? H by any suitable means, for example, through the spout J. It escapes over the edge of the plate H drops into the hopper H thence drops to the member G and flows over the edge of the head into the crushing cavity between the bowl liner C and the mantle G where it is crushed, escaping downwardly by gravity through the crushing zone. In this, type of crusher it is important to prevent creeping or crawling of the mantle on the head. I therefore provide automatic self-locking means,

namely the nut G which tends to rotate in re-' lation to the member G in response to any movement ,of' the mantle G on the head E Such movement causes the nut G to screw itself downwardly along the member G thus increasing downward pressure against the upper edge of the mantle G. This effect is so strong that the removal of the mantle becomes a problem. I therefore provide means for readily removing the mantle from the head. Assume-that the parts are in the position in Figure 1 and that removal of the mantle is desired. The operator by loosening the screw H can remove the cover H This gives access to the screws H which he can release, thus removing the entire hopper assemby H H He can then release the screws G lifting the plate G upwardly from the member G This exposes the tops of the screws G The operator can release these screws-and then remove the member G and the nut G as .a unit, thus leaving the mantle free for removal.

In removing or adjusting the bowl liner C the The proportion and location of they operator removes the cover plates B He can then lift ofi the lock washers or looking members Ci of which there'is one for each pair of nuts C With these lock washers or members removed the nuts can be released and the U-bolt assembly can then be lifted from the hook shaped lugs C It is advantageous to have the securing means entirely housed within the bowl assembly, protected from dust and grit. The shield IB closes whatever apertures there may be in the top of the bowl assembly B and protects the screwthreaded connection between the bowl and the ring A B is any suitable dust-proof closure to protect the lower side of the screwthreaded engagement of the opposed parts.

-It will be realized that whereas I have described and shown a practical and operative device, nevertheless many changes might be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description anddrawings to be taken as in a broad sense illustrative and diagrammatic rather than as limiting me to my specific showing.

I claim:

1. In a gyratory crusher which includes a crushing head and means for imparting a gyratory movement thereto and a crushing bowl surrounding said head, a removable mantle upon said head, said mantle being adapted for rotation upon said head in response to crushing contact, and means for maintaining said mantle tight upon said head in response to the normal crushing movement of said head, said means including a nut in frictional engagement with an upper portion of said mantle, said nut being screwthreaded in relation to an upper portion of the head, such upper portion of the head being bodily removable, with the nut, from the head.

2. In a gyratory crusher which includes a crushing head and means for imparting a gymtory movement thereto and a crushing bowl surrounding said head, a removable mantle upon said head, and means for maintaining said mantle tight upon said head in response to the nor-' mal crushing movement of said head, said means including a nut in frictional engagement with an upper portion of said mantle, a securing member, removably secured to the head and including an externally screw-threaded portion in screwthreaded relationship with said nut, securing means for said securing member and a wear taking member, overlying and protecting said securing means, said member being removably secured in position, and a feed directing member removably secured to the securing member and extending outwardly above the wear taking member.

3. In a gyratory crusher which includes a crushing head and means for imparting a gymtory movement thereto and a crushing bowl surrounding said head, a removable mantle upon said head, and means for maintaining said mantle tight upon said head in response to the normal crushing movement of said head, said means including a nut in frictional engagement with an upper portion of said mantle, a securing member, removably secured to the head and including an externally screwthreaded portion in screwthreaded relationship with said nut, securing means for said securing member and a wear taking member, overlying and protecting said securing means, said Wear taking member being removably secured to said nut and being provided with a wipin ronnection with the securing member.

OSCAR C. GRUENDER. 

